Solution : https://service.sap.com/sap/support/notes/139190 (SAP Service marketplace login required)
Key words : 
additional key words va01, attached program correction, incorrect main item, incorrect item, program error, configurable material, sales document, newly created, processed incorrectly, component quantity
Related Notes : 
       
| 329927 | Configuration - duplicated sub-items | 
| 197097 | Double components after configuration | 
| 185490 | SAP-APO, post-correction FV45STOP, SDSTPOX | 
| 166304 | Components not transferred from configuration |